But there's more: the widget now features autocompletion and hints. The widget suggests you the longest viable prefix for a given input string, and it's even able to suggest all function names that begin for that prefix. It's way easier to understand how it works trying by yourself than to explain. Once you'll try it you won't be able to do without it anymore!
Minimum system requirements are Mac OS X 10.4 "Tiger" or later, and an Internet connection (broadband recommended).